Silo-door construction.



CQJ. PERKINS.

suo'ooon consmucnou. APPLICATION FILED JAN.22. I915- 1,203,397. Patented001. 31,1916.

2 SHEETS-SHEET I mr urwRls FZTIIS In. nmmuma. wsmucnm. n. c.

C. J. PERKINS.

SILO 000R CONSTRUCTION. APPLICATION FILED IAN-22,1915.

UNITED PATENT OFFIGE.

cHAnLEs J. PERKINS, onions MOINES, IOWA, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, To PERFECTIO ooNonETE S AvE sILo ooMPANY, or PIERRE, SOUTHDAKOTA, A CORPORATION OF SOUTH DAKOTA.

SILO-IDOOR CONSTRUCTION.

Specification of Letters iatent.

TPatented Oct. 31, 1916.

To all whom it may concern:

Be it lmown that I, CHARILES J. PERKINS, a citizen of the United States,and a resident of the city of Des Moines, county of Polk, and State ofIowa, have invented certain new and useful Improvements in Silo- DoorConstructions, of which the following is a specification.

My invention relates to improvements in silo door constructions, and hasfor its object the provision of an improved construction of thischaracter which is strong and durable in use and also capable ofconstituting a ladder for the silo.

The invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings forming a part of this specification, and in which- Figure 1 isa front view of a silo construction embodying my invention, Fig. 2, anenlarged horizontal section taken through a door thereof, Fig. 3, anenlarged face view of a door frame detached and showing the doortherein, Fig. 4:, an enlarged section taken on line 44 of Fig. 1, Fig.5, an enlarged detail view illustrating a modified construction ofpositioning member for the door, Fig. 6, a section taken on line 6-6 ofFig. 5, and Fig. 7, a section illustrating a modified form of door frameconstruction.

The preferred form of construction, as illustrated in the accompanyingdrawings, comprises a plurality of oblong rectangular door framesmounted in the silo one above the other, each of said door framesconsisting of side channel members 8 and top and bottom channel members9 and 10 respectively. The side channel members 8 are of a size toembrace adjoining edges 11 of the silo wall construction and the lowerchan-.

nel member 10 is inwardly. offset to fit loosely within the upperchannel member 9 of the door frame below, thus forming shoulders 12resting upon the upper edges of the said upper channel member 9. Thedoor frames are set in the silo construction as indicated and rigidlysecured therein and thereto by means of mortar, as shown.

Each of the door frames is provided with a substantially rectangularsheet metal door 13 fitting against the inner side of the frame on itsouter face vertical positioning channel members 17 arranged to fitsnugly within the corresponding door frame to position the door thereonagainst either vertical or lateral displacements, said members 17 beingsecured in position by means of the bolts 16 which also serveto securethe ends of the strips 14. Buttons 18 are pivoted to the outer ends ofbolts 16 and serve as means for detachably securing the doors in position in their frames.

In the form of construction illustrated in Figs- 5 and 6, thepositioning members 17 on the door 13 are in the form of angle irons andsleeves 16 are'arranged about bolts 16 to effect a mounting for buttons18, as will be readily understood.

In the form of construction illustrated in Fig. 7, the inner shoulder 12on frame 10 is formed lower than the outer shoulder 12 and the rear side9 of the channel member 9 shaped to correspond.

While I have illustrated and described the preferred forms ofconstruction for carrying my invention into effect, these are capable ofvariations and modifications without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of constructions set forth, but desire to avail myself of suchvariations and modifications as come within the scope of the appendedclaims.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

1. In a silo construction, a door frame in combination with a dooradapted to close the opening in said frame, positioning members securedto the outer face of said door adjacent the lateral edges thereof and ofa length substantially the same as the height of the door frame opening,a truss member comprising a Strip of metal having its ends secured tosaid door between the same and said positioning strips, and its centralportion secured centrally to the door, the intermediate portions of saidstrip being bowed outwardly, bolts extending through said positioningmembers, the ends of said strips and said door and turn buttonspivotally mounted on the outer ends of said bolts, as and for thepurpose specified.

2. In a silo construction, a door opening, a plurality of super-imposeddoor frames arranged in said opening, each of said frames comprisingside channel members adapted to embrace the walls of said open- Copiesof this patent may be obtained for five cents each, by addressing theCommissioner of Patents,

ing and top and bottom channel members having the flanges thereofextending upwardly and downwardly respectively, the flanges of thebottom members being contracted to fit between the flanges of theadjacent upper member, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES J. PERKINS.

Witnesses:

JOSHUA R. H. Porrs, B. G. RICHARDS.

Washington, I). C.

